Engine-lathe.



N. D. GHABD.

ENGINE L'ATHE. `APPLIGATIN FILED NOV. 22, 1909.

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Itter/MAM I '2 SHEETS-SHEET 1.

Patented Jan. 17, 1911.

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*lvl busco N. D. CHARD.

ENGINE LATHE.

APYLIOATION FILED 11017.22, 1909.

Patented J an. 17, 1911.

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NETE@ S12-1.111115 PATENT OFFICE.

NICHOLAS T).

CHARD, OF CINCINNATI, OHIO, ASSIGNOR TO THE LODGE 8L SHIPLEY vlltIAI-.INE TOUL COIViPANY, F CINCINNA'LI, 01110, A CORPORATION OEVOHIO.

Application filed November To all 111710711 it may concern:

(`1n innati. in the countyot' llainilt'on and State of Ohio, have inxented certain new Patented Jan.. 17, '1911.

,ncction with the head-stock in any welllcnonn znanncr.

--l represents the carriage slidablc on ways 'l'orined on the hed, and 5 represents the i carriage apron depending therefrom.

1 l and useful tinproveinents n1 llngi11e-Lathes, f

of which 4the following is a specilication.

My invei'ition relates to an improvement in engine lathes. and priinarilvto the earriage feeding mechanism. e

(.)ne of the objects o'l' iny invention is to' provide a tarriagc 1. 111 of an engine, lathe with i'neani-i adapteil to eiigage'one or more stops in its path of travel to automatically discngage the feed driving mechanism.

Another ohjeet of my invention is to provide a latlnl apron with clutch actuating mechanism for controlling the feed in one direction ot' its travel, with means adapted to he adjusted to variousy positions for e11- gaging one ot' a series of stops, for actuating the clutch ineehanisni at a predetcrinined distance of apron travel.

Another object of my invention is to provide clutch controlling iiiec-hanisin for disengagingl the carriage feeding inechanisni in one direction o1l its travel and autoinatirally continuing the carriage feed in adjust ing the clutch controlling inechanisin to a secoi'id position for stop engagement'.

The features of the invention are more fully set forth in the description of the aecon'ipanying drawings, forming a part of this specification. in which Figure 1 yis a front elevation of a lathe, illustrating the features of my invention in conventional form. Fig. 2 is a rear elevation of the apron and feed controllingr mechanism with some of the parts in section. Fig. 3 is an enlarged section on line :r, n', Fig. 1. Fig. 4 is an enlarged section through one ot' thel stops adjnstahle on the lathe hed. Fig. 5 is a section on line 1e, il, Fig. Q. Fig. G is a detailed view of the cani collar mounted npon the clutch actuating rod with .a portion of the apron illustrated in section,

and a pin engagiiig into the cam groove for shifting the .clutch mechanism. Fig. 7 is 1 detailed view of one end of the clutch sleeve. y l

1 represents the lathe lied, 2 the headstock, which nia'v he of any conventioinil foi-n1.

3 represents tln.` feed screw in driven con- 'l'hc `gei'ieral s 'stein of gearing and feeding devices carried hy the apron may he olf any conventional type and only so much of the apron mechanism is herein shown and described as is necessary to disclose the features of my invention.

The feed screw 53 passes through the bearings (3, formed on the rear surface of the apron, as illustrated in Fig. 2, resent half nuts adapted to be clamped to the feed .screw for feeding the apron and carriage for screw-cutting. These half-nuts are simultaneously operated loy any welllv'nown ineans.

St. l0, represent beveled gears provided with sleeve extensions joiirnaling in the hearings 11,` 12. respectively, and free from the feed screw I. y

191 represents :1 lieveled gearin mesh with the hcveled gears t). 10, transn'iitting motion to :1 :s vstein ol' gearing carriedby the apron.

not herein illustrated, for feeding the. car-` riage upon the hed, according` to which of the gears t). lt)` is clutched to the fcedserew Il. to transmit motion to the feedingjlevices for .the tool slide.

14 represents av clutch sleeve splined to the feed screw 3 by means ofthe key 15, with each end thereof provided 'withjclntch teeth, adapted to alternately engage withr clutch teeth formed respectively on gears, t),

l0, for alternately engaging said; gears in driving connection with the feedscrew, for a forward or reverse travel of tliecarriage on the hed. Said clutch sleeve is provided with a circumferential groove 16, into which a yoke arm 17 engages, projected froin asleeve 18 loosely n'iounted upon the actuating rod 19 and held in position upon the rod`19 hy means of the collais 20, 21, fixed tothe rod 19. This permits of a longitudinal movement of the yoke arm 17,` for shifting"the,v y l, clutch sleeve, at the same time free "rotation,

of thc rod 1 Q2 represents a Cain collar splin'ed'iipon the actuating rod '19, the function of which will be hereinafter described, against collar 2l upon one side, with one end of the spring Q3 engaging against the oppoand 7, 8, rep-v bearing site side of said cam collar 22. The opposite end of the spring engages against the pin 24, fixed to the actuating rod 19, for noir: mally and automatically engaging the clutch sleeve 14 into engagement .with beveled gear 10, provided, however, that the rod 19 is free to move in said direction. To automatically unclutch such driving connection between the clutch sleeve 14 andthe beveled gear 10 at various points of apron or carriage travel, the following.,instrumentalities. are provided z-- represents a rack'bar fixed to the front side of lathe bed 1 of dove-tail formation, see Fig. 4, mounted a series o dogs 27, having projecting ends adapted to overlap one another, adapted when set together, as illustrated in Fig. 2, to form a single abutment for tripping the clutch sleeve 1,4, and which construction enables their adjustment individually to the slightest degree from that of the next adjacent dog,`enabling a series of automatic stops of carriage feed to be had at any ioint of the carriage travel. 28 represents a ell'crank lever fixed to the actuating rod 19,

see Figs. 2 and 3, with the arm 29 said lever rojected so that it may enfrafre any one of) the stops 27 in the path of iotsbtravel with the carriage, the opposite arm of the bell crank lever 28 is provided with spring actuated detent 30, adapted to engage into any one of the orifices or notches 31 in the .arc of bell crank lever movement, to position the arm 29 to. bring the saine in the path for engagement of a given dog 27. Thus, when the bell crank lever occupies the positionl illustrated in Fig. 3, the arm 29 is in position to engage with dog 27a of the series, which engagement will shift the actiiatin rod 19, disengaging the clutch sleeve 1 4 from' the beveled gear 10, stopping the feed in that direct-ion; releasing the engagement of the arm 29 with the dog 271l by swinging the bell crank lever 28 to a second notch or orifice will instantly restore the driving connection bet-Ween Vclutch sleeve 14 and beveled gear 10 through the tension-of spring23 against the pin 24,'the collar 22 being arrested in longitudinal movement by means of a pin 33 projected frointlieapron and engaging into a cani groove 34 foi-ined on the periphery of the collar 22,l see Figs. 2 and 6. Shiftingthe lever v28 so as to bring the 'detent 30 into engagement with the orifice 31 will swing the arm 29 to a position free from engagement-.with any of the stops of the series, but with the clutch sleeve 14 maintained in clutching engagement with the gear 10.I Bringing the lever-28 to engage de.-

'tent y30 with the orifice 31b will rotate the actuating Vrod 19 and cam collar` 22 suli eiently to engage the pini-53 with the angular surface of the cam groove 34, moving the iifpon .which is adjustably with orifice 313 will continue thelongitudinal action between the pin 33 and collar 22, shifting the clutch sleeve 14 into engagement with the beveled gear 9, for imparting a reverse feed to the'carriage and apron.

To prevent a simultaneous connection of half nuts 7 and 8 with the feed screw 3 and the engagement of sleeve 14 with any one of the gears 9fand 10, the following provision is nitidez-35 represents a notch formed in the actuating rod 19, and 36 represents a lug projected from the half.niit 8 through a slot 3 7 formed in the apron (see Fig. 2), adapted' to engage into ,the-notch 35, when the half nut is moved upwardly into engagemen-t with the feed/screw 3, and the clutch sleeve 14 occupies its intermediate idle position, in which instance the rod 19 has been moved to aline the notch 35'witli lug 3G. If, however, the clutch sleeve 14 is engaged vwith any one of the gears 9, 10, it would be impossible to 'engage the half nuts 7 and 8 witlivtlie feed screw 3, in which instance, during siich attempt of half-nut en. gagement, the lug 3G will engage against the periphery of the actuating rod 19, andprevent upward movement of the half init 8, and, as in practice, both half nuts 7 and 8 simultaneously it .is'inipossible to engage `are connected with each other and moved either independently. .The reverse condition exists if an attempt is made to clutch eitherv one of the gears 9 and 10 in driving connection with thefeed crew 3 if the half nuts are engaged therewith by reason of the locking engagement of .the lug 36 Avit-h the niit 35, preventing any shifting action of the'V actuating rod 19. f

- Any type of apron transmission mechanism may be employed common in the art or otherwise. The type illustrated comprises the following instriimentalitiesz-40 represents a gear (see Figs. 2 and 5) fixed to the shaft 41 joiirnaled in the apron 5. The bcv f eled gear 13 is also fixed to said shaft-41 and driven by the beveled gears 9 and 10, heretofore'described. 42 represents a -gear inmesli with gear 40 fixed to a stud shaft, and 43 represents a pinion in driving' connection with the gear 42, in nieshwith a gear 44,

fixed to a shaft joiirna'led in the apron, and 45 represents a rack gear in drivin Y connection with the gear 44, with tlievteet i of said rack gear 45, in mesh with the teeth of a rack- 46, fixed to the bed 1 of the lathe. Thus,

when the gear 13 is revolved,- motion will be transmitted to the train of gearsi42, 43, and rack gear 45feediiig the carriage horizontally on the bed. 1

Having described my nventron, I claim l; In a machine of the vclass described, a bed, a carriage movable thereon,A a feed i i., 'es

shaft, an apron carried b v the, carriage. a`

pair of beveled gears concentric with the feed shaft. suhstantiall)7 free from contact thereof. each journaled in an independent bearing formed upon the apron. a clutch sleeve splined upon the feed shaft adaned to alternatelj7 engage either one of said heveled gears. and clutch actuating mechanism comprising rotative means. cam mechanism carried thereby. for longitudinally sliding .said rotative means in its 'rotative action for alternateljv shifting said clutch into driving engagenient with either one of said beveled gears. and to a neutral intern'iediate position.

2. In a machine of the class described. a bed, a carriage movable thereon. an apron therefor. a feed shaft. a nair of beveled gears concentric with the feed Ishaft. sah- .stantiallv free from contact thereof. each journalediin an independent bearing formed upon the apron. a clutch sleeve splined upon the feed sha ft adapted to altermltclv engage either one of said beveled gears. clutch actuating mechanism. cam mechanism carried thereby for longitudinallv sliding said clutch actuating mechanism in a rotative action thereof. cam manipulating meclmnism i'ixcd to .said clutch actuzftting mechanism. adapted to he locked in various positions of arc travel. wherebjv the clutch sleeve is alternatelv .shifted into driving engagement with either one of said beveled gears. or to a neutral intermediate. position.

3. ln a machine. of the class described. a bed. a carriage movable thereon. feeding mean.s therefor. transmission devices carried bv the .arriage a series of tripping means adjustable on the bed inthe path of carriage travel. clutching devices for engaging said transmit-:snl i devices withthe feeding means, clutch actuating mechanism adjustable to engage any one of the series of clutching means for actuating the clutch mechanism at a predetern'iined distance of carriage travel. to discontinue the arriage travel. and means for automaticallj continuing the carriage feed upon diseiigagcment of the clutch actuating mechanism from the tripping means.

4. in a machine-of the class described` a bed. a carriage movable thereon, feeding means therefor. transmission devices carried h v the carriage. a series of tripping means adjustable on the bed in the rath of carriage travel. clutching means for engaging said transmission devices with the feeding means.

and clutch actuating mechanism adjustable to various positions for engaging an)v one of the series lof tripping means for actuating the clutch mcchanir-.m at: a j'nedetermined distance of carriage travel. 'to discontinue the carriage travel.

5. Tn a machine of the class described. a bed, a carriage movable thereon, va feed shaft. transmission devices mounted on the 6. l1n a machine of the class described'. a

bed. a carriage and an apron reciprocating thereon. aA feed shaft'. apron transmission mechanism adapted to'lie driven from the feed shaft to propel the carriagea clutch in the apron for controlling said transmission mechanism. a series of step-like stops in the path of the carriage travel. a stop engaging member on the. apron adjustable to engage a selected stop, and connections between said member and the clutch for throwing out the feed.

7. ln a machine of the class described. a carriage and an apron reciprocating there.- on. a feed shaft. apron transmission mechanism adapted to be driven from the feed shaft to propel the carriage. a clutch in the apron for controlling said transmission mechanism to feed the carriage in either direction, a series of step-like stops in the path of carriage travel, a stop engaging' device on the apron, connections between vsaid engaging device and clutch, a manually operated setting device for the stop engaging member, and means adapted to be actuated byv the n'ianipulation of said setting device to throw the clutch ont or into the opposite direction for reversing the carriage feed.

8. In a machine of the class described, a bed. al carriage and apron reciprocating thereon, a feed shaft, apron transmission mechanism adapted to be driven from the feed' shaft to propel the carriage, a clutch in the apron for controlling said transmission n'iechanisi'n. a series of step-like stops in the path of carriage travel. a. stop engaging member on the apron adjustable to engage a selected stop7 connections between said member and the clutch for throwing out the feed, and a spring exerting tension on said connections holding the clutch normally in driving position, whereby the 1djustmentl of the stop engaging member to a new position automatically throws in the feed.

9. -In a machine of the class described, a bed, a carriage and an apron reciprocating thereon, a. feed shaft'. apron transmission mechanism adapted to he driven from the feed shaft to propel the carriage, a clutch in the apron for controlling said transmission mechanism and feeding the carriage in leither direction, a series of stops in the path,

of' carriage travel, a rock shaft adapted to slide longitudinally, said shaft being connected to the clutch for moving thesame in either direction, a spring vtending to hold said shaft at one end of its longitudinal movement to normally maintain the clutch in the forward feeding position, a stop engaging member on the end of said shaft, and means for rotating said shaft into dif lferent positions to bring the stop engaging member into alinementl with a selected stop.

'10. In a machine of the class described, a bed, a carriageand an apron reciprocating thereon, a feed shaft, apron transmission mechanism adapted to be drivenvfrom the' feed shaft to propel the carriage, a clutch inthe apron for controllingA said transmission mechanism and feeding the carriage in either direction, a series of stops in the path of carriage travel, a rock shaft adapted to slide longitudinally, said shaft being connected to the 'clutch for moving the same in either direction, a spring tending to hold said shaft at, one end of its longitudinal movement to normally maintain the clutch in the forward feeding position, a stop engaging member on the end of said shaft, means for rotating saidl shaft/into different positions to bring thei stop engaging member into'alinementv with a selected stop, and means adapted to be actuated by the rotation of the shaft to throw the clutch into neutral positionor to reverse the feed.

In testimony whereof, I have hereunto set my hand.

NICHOLAS D. CHARD.

Vitnesses:

OLivER B. KAISER, EMMA SPENER., 

